Intake Stack??

K so i saw this scoot with a volecity stack intake on it and was wondering if anyone has input on them i think they are so nice looking but as far as performance and clean air intake? So throw your thoughts my way please need some opinions.

An open stack gives better performance than most air cleaners (on Harleys, at least). You run the risk of sucking all sorts of detrimental crap into your engine, though. A stack with a small internal filter eliminates that problem, but won't have enough filter surface area to add any performance. If it's too small, it will actually hurt performance.